Derrick.



W. F. & E. W. MUTE.

DERRICK.

APPLIOATION FILED FEB.6, 1911.

1,023,327. Patented Apr. 16, 1912.

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-.= I I] 1 I /g W. F. & E. W. MUTH.

DERRICK.

APPLICATION FILED FEES, 1911.

1,023,327. Patented Apr. 16, 1912.

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TJNTTED STATES; PATEN T GFFTQE.

\VALTER F. MUTH AND EUGENE W. MUTI-I, OF DAYTON, OHIO.

' DERRICK.

Specification of Letters Patent.

Patented Apr. 16, 1912.

To all whom it may concern Be it known that we, lVAL'rnR F. MUTH and EUGENE WV. MUTH, both citizens of the United States, residing at Dayton, in the county of Montgomery and State of Ohio,

have invented certain new and useful Improvements in Derricks, of which the fol-- lowing is a specification.

Our invention relates to hoisting apparatus, and particularly to extendible derricks,

capable of being erected in limited space.

e are well aware that heretofore derricks have been constructed embodying a plurality of sections, each succeeding section telescoping into the next lower section.

However such derricks have usually been of comparatively light construction and suitable for lifting only limited loads. The derrick forming the subject hereof, is cspecially adapted to lifting extremely heavyweights particularly large boilers, heavy machinery, involving several tons of weight and is especially adapted for setting smoke stacks, or similar purposes. In order to conveniently erect a smoke stack, it is necessary that the derrick should be of great height as well as of maximum strength. Furthermore it is frequently found that a smoke stack must be erected or the machin- 0 ery handled in such limited space as will not ricks formed of very heavy timbers of great length, as hereinafter described.

The object of the invention is to simplify the structure as well as the means and mode of operation of such devices, whereby they will not only be cheapened in construction,

but which may be conveniently and readily erected to great height in a limited space, which may be adjustable to any deslred height within the capacity of the several sections, and which will possess maximum strength and stability.

With the above primary and the incidental objects in view, as will more fully appear in the specification, the invention However the methods used in consists of the features of construction, the parts and combination thereof, and the mode of operation, or their equivalents, as hereinafter described and set forth in the claims.

Referring to the drawings, Figure 1, is an elevation of the assembled derrick fully extended. Fig. 2, is an elevation of the first stage in the erectionof the derrick, showing the first and second sections thereof telescoped, and in dotted lines the second section projected to its extended position. Fig. 3, is a detail view showing the connection of the cross arms, with the timbers of the second section. Fig. 4, is a plan view partly in section showing the connection of the cross arms with the timbers of the second section of thederrick. Fig. 5, is an elevation of the second stage in the erection of the derrick, the second section having been elevated and secured in place, the timber comprising the third section being lifted to position. stage in the erection of the derrick, showing the timber forming the third section in position within the second section and ready to Fig. 6, is anelevation of the last be projected upward therefrom as shown by dotted lines in Fig. 2. Fig. 7, is a detail plan view of the clamp for securing the timbers in their adjusted positions. Fig. 8, is a detail plan view of the cross head carried at the top of the upper section of the derrick. Fig. 9 is a View in perspective of the upper portion of the top section.

Like parts are indicated by similar characters of reference throughout the several views.

It is to be borne in mind that the derrick forming the subject matter hereof, is constructed of extremely heavy timbers of great length, the size of the timbers preferably varying from eight by ten inches in cross sect-ion and forty feet long to timbers, twelve by fourteen inches, in cross section and of the same length. Consequently the conditions involved in the erection of such a derrick are quite different from those found in the erection of comparatively light struc- 1 tures. It is to be understood that the di mensions herein mentioned are not essential, but are those which have been found most convenient for the purpose for which the derrick is intended.

In constructing the derrick there is employed a timber 1, of comparatively large size, having parallel cross arms '2, rigidly secured thereto, adjacent to its upper extremity. The ends of the cross arms 2 are provided with holes or other means of attachment, for lateral guys 3. Located on each side of the timber 1, and between the cross arms 2, are two parallel timbers 4, adapted to telescope upon the timber 1. These timbers 4, form the second section of the derrick, and are connected at their opposite extremities, by cross arms 5 and 6, located on opposite sides thereof. The cross arms 5 and 6 are connected to the timbers 4,

by means of transverse studs or bolts 7 engaging in slots 8, in the said cross arms 5 and 6, whereby the timbers 4 will be adjustable within the limits of the slot 8 to and from each other. The third section of the derrick, comprises a single timber 9, telescoping between the timbers 4 of the second section, and having at its lower end the parallel cross arms 10, rigidly secured thereto, and at its upper end a cross head 11.

The several sections are adapted to be secured in their adjusted positions by means of clamping members, which comprise parallel side bars 12 and transverse bolts 13, adapted to draw the timbers 4-4 of the second section toward each other, thereby clamping the upper extremity of the first section timber 1, and the lower extremity of the third section timber 9, between timbers 4-4. p

In erecting a derrick, the first and second sections are raised to upright position with the main timber 1 telescoped within the second section timbers 44, as shown in Fig. 2. A lifting cable 14, passing through suitable blocks or sheaves 15, is attached at its upper end either to the upper portion of the main timber 1, or to the cross arm 2, as

shown in Fig. 2, and at its lower end, it is attached to the cross arm 5, of the second section timbers 4-4. By drawing upon the cable 14, the second section timbers 44 are projected upward as shown in dotted lines in Fig. 2, until the desired height is attained. The timbers are then secured in position by means of the clamping members before mentioned, the side bars 12 of which are located at each side of the timbers 4-4 with the'clamping bolts 13 extending across the timbers 4-4 and the intermediate timber 1; By tightening the bolts 13, the timbers4-4 are caused to approach each other, such: movement being permitted by the slotted connection 8, of the cross arms 5, and the upper endof the timber 1,. is securely gripped between the said timbers 4-4. The

first and second sections of the derrick be-' ing thus-secured in their adjusted positions, the elevating cable14, is disconnected therefrom. One'of the cross arms 6, of the timbers 4-4 is removed before elevating the secondsection to its adjusted position, in order that the'third'section 9, may be inore easily located in position. In order to properly place the third section timber 9, an elevating cable 16, passing through suitable blocks or sheaves 17, is secured at its upper end to the remaining cross arm 6 of the timbers 4, and at its lower end to the timber 9, at a point somewhat above the midlength of said timber. By means of the cable 16, the third section timber 9, is elevated, and while suspended upon the cable is readily swung to proper position intermediate the second section timbers 4-4, where it is secured by replacing the cross arm 6, previously removed, and by securing the cross arms 10 to the-lower end of the timber 9. The cable 16, still attached to the cross arm 6, at its upper end is now attached to the timber 9, adjacent to the lower end thereof, or to the cross arm 10, as shown in Fig.6. By drawing upon the cable 16, the third section timber 9, is now projected upward from between the timbers 4-4 as shown by dotted lines in Fig. 6, where it is secured by means of the clamping member comprising the clamp bar 12, and bolts 18, as before mentioned.

Before the third section of the timber 9 is elevated to its position between the timbers 4-4, a cross head 11 is secured to the. upper end of the timberupon which the lifting cables for the work are to be sup ported. The cross head 11 comprises two parallel side bars 18, secured in recesses or upon shoulders formed upon the extremity of the timber 9. Space blocks 19 are located between the parallel side bars 18, theseveral parts being secured together and in position upon the timber 9 by transverse bolts 20. The cross head 11 is so proportioned that it will project substantially twice as far from the derrick timber 9' on one side as upon the other. The short side of the head is the one upon which the lifting cables are suspended, two or more sheaves 21 being provided for this purpose.- The opposite. arm of the head is provided with a sheave 22 over which passes the lead or fall line.,. Clevises 23 are secured to the opposite ends of the cross head 11, within which are secured guy ropes 24.

In dismantling the derrick, the erecting process herein described is reversed. The elevating cables 14 and 16 are secured in position and the clamping members are removed, permitting the several sections to be gradually lowered bymeans of the cables.

For lighter lifting there is employed an adjustable member or yoke 25 suspended on the short arm of the head, and movable thereon to and from the timber 9. A pulley 26 is carried on the yoke 25, through which the lifting cable is reeved.

It has been found in practice entirely 'feasible and practical, using timbers of'approximately the dimensions hereinbefore mentioned to erect a derrick to the height of one hundred and eight feet, which will sustain loads'many tons in weight.

From the above description it will be apparent that there is thus provided a derrick of the character mentioned, suitable for lifting extremely heavy loads, which may be readily and conveniently erected to great height in a Very limited space, and which possesses the several features of advantage before enumerated as desirable, but which obviously is susceptible of modification in its form, proportion, detail construction, and arrangement of parts, without departing from the principle involved, or sacrificing any of its advantages.

Having thus described our invention we claim:

1. In an extendible derrick, a plurality of telescoping sections longitudinally adjustable in relation to each other comprising two sections of a single longitudinal member each, and an intermediate section comprising two parallel members between which the adjacent extremities of the first mentioned sections project, cross arms connecting the parallel members of the intermediate section having slotted connect-ions therewith, whereby the parallel members will be capable of movement to and from each other independent of the cross arms, and means for adjusting the parallel members toward each other whereby the extremities of the first mentioned sections may be clamped between the parallel members.

2. In an extendible derrick, a plurality of telescoping sections, the first section comprising a single member, parallel cross arms rigidly secured to the opposite sides of the member, adjacent to the upper end thereof, parallel longitudinally adjustable members located on opposite sides of the single first section member and between the cross arms thereof, cross arms connecting the parallel members having a yielding connection therewith, whereby the parallel members may be adjusted to and from each other, the said parallel members and cross arms forming the second section of the derrick and adapted to be projected above the first section by a sliding movement upon the first section member, and a third section comprising a single member adapted to be lifted to position between the parallel members of the second section and to be projected upward therefrom, and clamping members adapted to inclose the parallel members of the second section and draw said members toward each other whereby the extremities of the first and second sections will be clamped between said members.

In testimony whereof, we have hereunto set our hands this 4:th day of February, A. D. 1911.

WVALTER F. MUTH. EUGENE W. MUTH.

Witnesses:

ALFRED ll/IOCRAY, F. L. WALKER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

